Hey,
Got some basic questions about ammonia and how it differs from halocarbon refrigerant systems. I'm well aware of the toxicity and trapping of liquid ammonia between valves. I've been to 2 four day training courses strictly for ammonia use, but some questions linger.
For example if you need to isolate part of an ammonia chiller for repair lets say the compressor package. Do you can you just vent the ammonia? If so what are the best practices involved? Is there recovery equipment for industrial purposes or is that a waste of money? On a basic ammonia chiller like a Vilter with a thermo syphon evaporator setup and the levels in the evap are too high... Can you drain the ammonia by gravity or is that possible? If oil from the separator gets lost out in the chiller, will it come back with run time or does if have to be drained?
I have lots of exposure to industrial chillers using R-22, 123, 507, 404a etc.
I know 717 deserves respect
Any help appreciated.